What is the variance of 23,19,22,30,28 ?

The variance of 23,19,22,30,28 is 20.3

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variance of 23,19,22,30,28

variance

23, 19, 22, 30, 28

20.3

Solution steps

Compute the average,

\overset{x}{ˉ} : 24.4

Compute

i = 1 \sum n (x_{i} - \overset{x}{ˉ})^{2} : 81.2

Compute the number of terms in the data set:

n = 5

Compute

Va r (X) = i = 1 \sum n \frac{( x _{i} - x ˉ ) ^{2}}{n - 1} : 20.3

20.3

2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13

13 C 6

314, 321, 315, 316, 314, 311, 307, 316, 312, 314, 303

7 P 3

7, 7, 8